Circuit-closing device.



F. M. ROSENFELD.

CIRCUIT CLOSING DEVICE.

APPLICATION FILED JAN-15.1915

.1 ,1 54,1 30. Patented Sept. 21, 1915.

w mm 18 EwmMo z/ 77?. Francis M .Ros efv fe bd/ l whom itrincg concern isfa iplan view of a v ClQSIHg device "suitable material.

etlie'r terminal 6 runners M. RosENrn'tn, or NEW YORK, N. Y., ASSIGNOR- Tl) IMPORT SALES COMPANY,

- m CORPORATION on NEW YORK.

CIRCUIT-CLOSING DEVICE.

Specification of Letters Patent.

Patented Sept. 21, 1915.

Application filed January 15, 1915. Serial No. 2,305.

s aknow that I,"FRANcIs M; Rosnn rnpma citizen of theUnited States, and a 1 resident of the borough. of Manhattan, city,

county," and- State of New York, have invented'certain new and useful Improvements in Circuit-ClosingDevices, ofwhich the following is a-specification'.

My invention relates to devices which are operable manually toclose electric circuits. he object of my invention is to provide suchacircuit closing devicewhich will be inexpensive toconstruct, neat in appearance, easy to operate and'which at the same time will-.be protected against accidental operauOn-.;.--

invention as applied merely; as an example of a use to which my improved circuit closing'device may be put. In the drawing, Figure 1 1s a side elevation of a portable electric lamp to which my improved circuit closing device is attached; Fig. 2 is a sectional vieu of the same; Fig. 3 i portion of the circuit and Figs. 4 and 5 are section'al views showing the circuit closing device in detail. I

Reference numeral 6- indicates a battery I or source of electric current such as is cus- 'tomarily used in a portable electric lamp and-Which is provided at its ends with the termirialsti and 6 Inclos'ing this battery acasing' 7 constructed offiber or other Upon either end of the casing? is secured a metallic screw threaded nember 8 9. The member 8 is electrically nected ,t'o the terminal 6 of the battery through the spring 10 connected to the metallic'screW threaded cap 11 which is adapteniber 9 is electrically connected to the of the battery through the filamentgof the lamp 12, and the metallic (reflector, 13. The reflector 13 and lens 14 are-held in position by means of the screw threaded cap 15. The parts above describedare. of ordinary'construction in devices of this type and do not per. se form any part of my invention.

'The member 8 and consequently the terminal 6 of the battery is electrically connected bymeans of the conductor 16 to the guide member 17. This guide member 17 vterial and is secured with the terminal 6 the reflector 13 and the lamp filament. It is o-fhe' screwedon to the member 8. The

,the slidable contact mem may be of metal or other conducting mato the exterior of the casing 7 by means of the rivets 1S and 19, the rivet 18 serving also to electrically connect the guide member 17 to the conductor 16. This guide member 17 is provided with two openings therethrough, 20 and 21. In the opening 20is the rivet 22 which serves as a stationary contact and also to hold the conductor 23, located on the interior of the casing, in position. This conductor 23 serves to connect the rivet 22, or stationary contact of the battery through to be noted, see for instance Fig. 3, that the contact member 22 is insulated from the guide member 17 by reason of the opening 20. Also it should be noted that by reason of the opening 24: in the conductor 23 the ri et 19, which is electrically connected to the guide member 17, is insulated from the conductor Slidably mounted on the guide member 17, as shown in Fig. 5, is the slidable contact member 25. This slidable contact member is made of metal or other conducting material and is normally connected to the terminal 6 through the guide member 17, rivet 18, conductor 16, etc. lVhen in normal position, however, the sliding contact member 25 is insulated from the stationary contact member 22, which is, as has been stated, connect ed to the other terminal battery. To insure proper insulation the slidable contact member is 1)1O"ll(l on the surface thereof, which is adjacent to the stationary contact member with an indentation 26, as clearly shown in Fig. 4. The forming of this indentation on the inner surface of the sliding contact member serves to form also a corresponding projection 27 on the other or outer surface thereof, which is useful as a thumb piece by means of which the slidable contact member may be operated. The slidable contact member 25 is also provided with a projection 28 on the surface thereof which is adjacent the stationary contact member. This pro jection 28 normally rests in the opening 21 of the guide member and serves to lock the slidable contact member in normal position. To close the circuit through the battery and lamp filament, .it is merely necessary to move her to the left, as shown in Fig. 4, by a pressure of the thumb on the projection 27. This moves the proof the battery jection 28 into contact with the'stationaiy contact member and thus closes the'circuit. Projection 28, while in. contact with the stationary contact member will also rest in the opening 20, thus serving to lock the slidable contact member in o erated position. The slidable contact member may be returned to normal position by a pressure of the thumb on the lel't hand side of the projection 27, as shown in Fig. l, or by placing the thumb partially intothe depression 29 formed on the exterior of the slidable contact member and corresponding to the projection 28 on the interior thereof. The slidable contact member may be bent over at its ends or provided with suitable projections such as are shown at 30 in the drawing to limit its movement with respect to the guide member 17.

The operation of my improved circuitclosing device should be apparent from the above description. The simplicity of my device is a great advantage, since it is practically' impossible for it to get out of order or for itto be accidentally operated. the expense of the manufacture is reduced to a minimum. i or example, it is to be noted that the rivet 18 serves to secure both the guide member 17 and the conductor 16 in position and to electrically connect these two elements. Again the rivet 22 serves as the stationary contact member and also serves to retain the COIIClLlCtOl 23, to which it is electrically connected, in position. Of the three rivets, the rivet 19 alone serves but one purpose, namely, to retain the guide member 17 in position. The fact that my improved device is small in size and substantialy flat 1s also an advantage for obvious reasons.

\Vhile I have described a particular embodiment of my invention and one used in connection with a particular type of device, I do not wish to be limited by my disclosure and description, since obviously many changes may be made in my improved circuit closing device by those skilled in the art, without departing from the spirit of the invention.

- What I claim is:

1. In a portable electric lamp, :1 battery inclosing casing, a fixed guide secured to and substantially flush with the exterior surface oi? said casing and provided with an opening therethrougl'i, a fixed contact member located in. said opening and connected to one ternnnal oi the battery circuit and a Also- 7 s.idable contact member mounted on said guide in uxtaposition to said fixed contact member and normally insulated therefrom,

but adapted when operated to contact therewith.

2. In a portable electric lamp, a battery guide in juxtaposition to said fixed contact member and provided with an indentation in the surface thereof adjacent to said fixed contact member, whereby the slidable contact member is normally insulated from the fixed contact member, said slidable contact member being adapted when operated to contact with the fixed contact member.

3. In a circuit closing device, a fixed guide provided with'an opening, a fixed contact member loc: ted in said opening, and a slidable contact member mounted on said guide in juxtaposition to sai'd'fixed contact member, and normally insulated therefrom, said slidable contact member being provided with a projection on the surface thereof adjacent the fixed contact member and adapted to contact therewith when the slidablc contact member is operated, and to rest in said opening to lock the slidable contact member in operated position.

4. In a circuit closing device, a fixed guide provided with an opening, a fixed contact member located in said opening, and a slidable contact member mounted on said guide in juxtaposition to said fixed contact member, and normally'insulated therefrom, said slidable contact n mber being provided will: a projection on tne surface thereof adjacent the fixed contact member-and adapted to contact therewith when the slillablc contact member is operated. and to rest in said opening to lock the slidable contact member in operated position, said fixed guide being provided with another opening in which said projection is adapted to rest to lock the slidable contact member in normal position.

In testimony whereof Ihave signed this specification in the presence of two subscrib ing witnesses.

FRANCIS M. IRISFNFELD. lVitnesses \Vanrnn S. Jo x ES, M] S. MAoIx'rvia-r 

